City size comparison

compared to

Paris is about 3.4 times bigger than San Mateo.

San Mateo is approximately 31 sq km, while Paris is approximately 105 sq km, making Paris 235% larger than San Mateo.
Tip: This to-scale comparison of San Mateo vs. Paris uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Paris vs. San Mateo

Flip Comparison · See true size
See Paris on top of San Mateo
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Cost of Living Comparison · 7 categories - 2026 data
San Mateo is 39.4% more expensive than Paris
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